Very curious what hot pressures you ran. Some r-tires, like Dunlops Direzza get really bad tramlining with slightly high pressures.
Also, did you have even wear or extra wear on the tire shoulders?
Edit: reread earlier posts :-) You have more optimal rim widths
My 9" up front with 265 is.. not optimal. And your10.5" with higher ET is a very good idea. Why go from 30 to 35 though?